Scientists establish the age of a rock or fossil based on natural radioactive decay and certain elements such as potassium and carbon, this is used to make reliable “clocks” to date ancient events.
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Traits are located on "Chromosomes" in the nucleus
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Groundwater is recharged naturally by rain and snow melt , hope this helps :)
A hypothesis is an idea or explanation that you then test through study and experimentation. A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. . Most hypotheses can be supported or refuted by experimentation or continued observation. Theory: A theory is more like a scientific law than a hypothesis. I hope this helps! Please give me stars to tell me how well I'm doing.
